Re: Abstract Core Ontology for SWSL Processes

At 10:51 24/01/04 -0800, David Martin wrote:
>Will the representation of the temporal aspects of services get used for 
>practical purposes on the Semantic Web?  If so, what kinds of questions 
>will these representations be used to answer?  What are the most important 
>questions for them to be able to answer?  Are there any systems in 
>widespread use that apply temporal reasoning to solve practical problems 
>(and which might have some relevance for SW services)?

I'm not sure if this is the sort of thing you're after...

I have done a little work on developing a "real world" semantic web 
application to control network access [1].  The temporal element was the 
description of time intervals during which certain kinds of access is 
permitted.  The reasoning support required is pretty simple;  questions 
like:  is this time (e.g. now) within this interval?  Also, maybe more 
importantly, being able to transform an internal representation into a 
representation used by some other existing system -- this is mostly a 
syntactic matter, but (for example) there could be requirements to 
translate to intervals expressed as "from,to" or "from,duration".  Handling 
of recurring intervals was the trickiest areas I encountered.

My work was based on the emerging RDF vocabulary [2] for iCalendar format 
[3], and (after teasing out some ambiguities) the semantics thus provided 
were plenty adequate to handle my modest goals.

#g
--

[1] http://www.ninebynine.org/SWAD-E/Intro.html#HomeNetAccessDemo

[2] http://www.w3.org/2002/12/cal/

[3] http://www.ietf.org/rfc/rfc2445.txt



------------
Graham Klyne
For email:
http://www.ninebynine.org/#Contact

Received on Monday, 26 January 2004 08:44:50 UTC